<template>
    <div class="app-container">
        <h2 style="text-align: center;">发布新课程</h2>

        <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
            <el-step title="填写课程基本信息"/>
            <el-step title="创建课程大纲"/>
            <el-step title="最终发布"/>
        </el-steps>

        <el-button type="text" @click="openChapterDialog()">添加章节</el-button>
        <!-- 章节 -->
        <ul class="chanpterList">
            <li v-for="chapter in chapterVideoList" :key="chapter.id">
                <p>
                    {{chapter.title}}
                    <span class="acts">
                        <el-button type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                        <el-button style="" type="text" @click="openEditChapter(chapter.id)">编辑</el-button>
                        <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                    </span>
                </p>

                <!-- 视频 -->
                <ul class="chanpterList videoList">
                    <li v-for="video in chapter.children" :key="video.id">
                        <p>{{ video.title }}
                        <span class="acts">
                            <el-button type="text" @click="openEditVideo(video.id)">编辑</el-button>
                            <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                        </span>
                        </p>
                    </li>
                </ul>
            </li>
        </ul>
        <el-form>
            <el-form-item>
                <el-button @click="previous">上一步</el-button>
                <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
            </el-form-item>
        </el-form>
        <!-- 添加和修改章节表单 -->
        <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
            <el-form :model="chapter" label-width="120px">
                <el-form-item label="章节标题">
                    <el-input v-model="chapter.title"/>
                </el-form-item>
                <el-form-item label="章节排序">
                    <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
                </el-form-item>
            </el-form>
            <div slot="footer" class="dialog-footer">
                <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
            </div>
        </el-dialog>

        <!-- 添加和修改课时表单 -->
        <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
            <el-form :model="video" label-width="120px">
                <el-form-item label="课时标题">
                    <el-input v-model="video.title"/>
                </el-form-item>

                <el-form-item label="课时排序">
                    <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
                </el-form-item>
                
                <el-form-item label="是否免费">
                    <el-radio-group v-model="video.free">
                        <el-radio :label="true">免费</el-radio>
                        <el-radio :label="false">默认</el-radio>
                    </el-radio-group>
                </el-form-item>

                <el-form-item label="上传视频">
                    <el-upload :on-success="handleVodUploadSuccess" :on-remove="handleVodRemove" :before-remove="beforeVodRemove"
                    :on-exceed="handleUploadExceed" :file-list="fileList" :action="BASE_API+'/eduvod/video/upload'" :limit="1" class="upload-demo">
                        <el-button size="small" type="primary">上传视频</el-button>
                        <el-tooltip placement="right-end">
                            <div slot="content">最大支持1G，<br>
                            支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                            GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                            MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                            SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
                            <i class="el-icon-question"/>
                        </el-tooltip>
                    </el-upload>
                </el-form-item>
            </el-form>
            <div slot="footer" class="dialog-footer">
                <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
                <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
            </div>
        </el-dialog>
    </div>
</template>
<script>
import chapter from '@/api/edu/chapter'
import video from '@/api/edu/video'
export default{
    data() {
        return {
            saveBtnDisabled: false,
            chapterVideoList:[],
            courseId:'',
            chapter:{
                title:'',
                sort:0,
            },
            video:{
                title:'',
                sort:0,
                free:0,
                videoSourceId:''
            },
            dialogChapterFormVisible:false,
            dialogVideoFormVisible:false,
            //上传视频的值
            fileList: [],//上传文件列表
            BASE_API: process.env.BASE_API // 接口API地址
        }
    },
    created() {
        //获取路由的id
        if (this.$route.params && this.$route.params.id) {
            this.courseId = this.$route.params.id
            //根据课程id查询章节和小节
            this.getChapterVideo(this.courseId)
        }
        
    },
    methods:{
        //点击x执行的方法
        beforeVodRemove(file, fileList){
            return this.$confirm(`确定移除 ${ file.name }？`);
        },
        //点击确定会执行的方法
        handleVodRemove(){
            //调用接口的删除视频的方法
            video.deleteAliyunvod(this.video.videoSourceId)
                .then(response => {
                    this.$message({
                        type:'success',
                        message:'删除视频成功'
                    })
                    //文件列表清空
                    this.fileList = []
                    //清空视频id和名称
                    this.video.videoSourceId = ""
                    this.video.videoOriginalName = ""
                })
        },
        //上传视频成功的方法
        handleVodUploadSuccess(response, file, fileList) {
            this.video.videoSourceId = response.data.videoId
            this.video.videoOriginalName = file.name
        },
        //上传之前的方法
        handleUploadExceed() {
            this.$message.warning('想要重新上传视频，请先删除已上传的视频')
        },
//=================小节==================
        //打开弹窗
        openEditVideo(videoId) {
            //弹框
            this.dialogVideoFormVisible = true
            console.log(videoId + "=====================")
            //调用接口
            video.getVideo(videoId)
                .then(response => {
                    this.video = response.data.video
                })
        },
        //修改小节
        updateVideo() {
            this.dialogVideoFormVisible = false
            video.updateVideo(this.video)
                .then(response => {
                    this.$message({
                        type:'success',
                        message:'修改小节信息成功'
                    })
                    //刷新页面
                    this.getChapterVideo()
                })
        },
        //删除小节
        removeVideo(id) {
            this.$confirm('此操作将永久删除小节记录, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {
                video.deleteVideo(id)
                    .then(response => {//删除成功
                        //提示信息
                        this.$message({
                            type: 'success',
                            message: '删除成功!'
                        });
                        //刷新页面
                        this.getChapterVideo() 
                    })
            })
        },
        //添加小节弹框的方法
        openVideo(chapterId) {
            //弹框
            this.dialogVideoFormVisible = true;
            this.video.title = '';
            this.video.sort = 0;
            this.video.free = true;
            this.video.id='';
            //设置章节id
            this.video.chapterId = chapterId;
            //设置课程ID
            this.video.courseId = this.courseId;
            //清空视频列表
            this.fileList = []
        },
        //添加小节
        addVideo() {
            video.addVideo(this.video)
                .then(response => {
                    //关闭弹框
                    this.dialogVideoFormVisible = false
                    //提示信息
                    this.$message({
                        type:'success',
                        message:'添加小节信息成功'
                    })
                    //刷新页面
                    this.getChapterVideo()
                })
        },
        saveOrUpdateVideo(){
            if(this.video.id) {
                this.updateVideo()
            } else {
                this.addVideo()
            }
        },
//=================章节==================
        //删除章节
        removeChapter(chapterId) {
            this.$confirm('此操作将永久删除章节记录, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {
                chapter.deleteChapter(chapterId)
                    .then(response => {//删除成功
                        //提示信息
                        this.$message({
                            type: 'success',
                            message: '删除成功!'
                        });
                        //刷新页面
                        this.getChapterVideo()
                        
                    })
                
            })
        },
        //修改章节弹框数据回显
        openEditChapter(chapterId) {
            //弹框
            this.dialogChapterFormVisible = true
            //调用接口
            chapter.getChapter(chapterId)
                .then(response => {
                    this.chapter = response.data.chapter
                })
        },
        //弹出页面
        openChapterDialog() {
            //弹框
            this.dialogChapterFormVisible=true
            this.chapter.title=''
            this.chapter.title=''
            this.chapter.sort=0
        },
        addChapter() {
            this.chapter.courseId = this.courseId
            chapter.addChapter(this.chapter)
                .then(response => {
                    //关闭弹框
                    this.dialogChapterFormVisible = false
                    //提示信息
                    this.$message({
                        type:'success',
                        message:'添加章节信息成功'
                    })
                    //刷新页面
                    this.getChapterVideo()
                })
        },
        //修改章节的方法
        updateChapter() {
            chapter.updateChapter(this.chapter)
                .then(response => {
                    //关闭弹框
                    this.dialogChapterFormVisible = false
                    //提示信息
                    this.$message({
                        type:'success',
                        message:'修改章节信息成功'
                    })
                    //刷新页面
                    this.getChapterVideo()
                })
        },
        //添加章节
        saveOrUpdate() {
            if(!this.chapter.id) {
                this.addChapter()
            } else {
                this.updateChapter()
            }
        },
        //根据课程Id查询章节和小节
        getChapterVideo() {
            chapter.getAllChapterVideo(this.courseId) 
                .then(response => {
                    this.chapterVideoList = response.data.allChapterVideo
                })
        },
        previous() {
            console.log('previous')
            this.$router.push({ path: '/course/info/' + this.courseId})
        },
        next() {
            console.log('publish')
            this.$router.push({ path: '/course/publish/' + this.courseId })
        }
    }
}
</script>
<style scoped>
    .chanpterList{
        position: relative;
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .chanpterList li{
        position: relative;
    }
    .chanpterList p{
        
        font-size: 20px;
        margin: 10px 0;
        padding: 10px;
        height: 70px;
        line-height: 50px;
        width: 100%;
        border: 1px solid #DDD;
    }
    .chanpterList .acts {
        float: right;
        font-size: 14px;
    }
    .videoList{
        padding-left: 50px;
    }
    .videoList p{
   
        font-size: 14px;
        margin: 10px 0;
        padding: 10px;
        height: 50px;
        line-height: 30px;
        width: 100%;
        border: 1px dotted #DDD;
    }
</style>